Pressing machine (work holding means)



Aug. 4, 1931-. P. N. BRAUN PRESSING MACHINE (WORK HOLDING MEANS) Filed April 9. 1928 J N VEN TOR.

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Patented Aug 4, 1931 i UNITED STAT-ESPATENT o FicE PHILIP N. BRAUN, OF SYRACUSE, YORK, ASSIGNOR TO THE PROSPERITY com- PANY 1110., OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK ranssme MACHINE wonx HOLDING mums Application filed April a, 1928. Serial No.- 268,450.

This invention relates to pressing machines such as garment and laundry pressing machines and has for its object, means for holding the work on the lower pressing element or buck of the machine and a manual control for the power means which closes the press, the manual control being carried by the work holding means.

The invention consists inthe novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate correspondmgl parts in all the Figure 1 is a views.

fragmentary side elevation of a pressing machine embodying this in.-

vention. Figure 2 is a diagrammatic view showing parts in section and illustrating. the manuals for bringing the work holding means down onto the work on the lower pressing element or buck a nd for controlling the actuation of the motor means which closes Figure 3 is a fragmentary front elevation of the buck, work holding means and head. Figure 4 is an enlarged fragmentary side elevation of the work holding means and the head showing the them.

latch means connecting Figure 5 is a fragmentary plan view of the buck and one of the work holder members.

Figure 6 is an enlarged detail .view showing crating the pivoted connection between the oplinks of the work holding means.

This pressing machine comprises generally a buck, ahead mova buck, motor means work holding mean I to close the press,

' carried by the work ble toward and from the for actuating the head, s movable manually tomanual means for conthe manual means being holding means and preferably comprising a pair of manuals interconnected so that both must be operated substantially simultaneously to ing of the press.

1 designates the buck 2,

effect the closthe head movable toward and from .the buck, the buck beingmounted on a suitabl ported by a frame 4, and th carried by a ends on a spindle 6 carried 7 rising from the frame.

The work holding means in e table 3 supe head 2 being lever 5 pivoted between its by a standard the illustrated embodiment of my invention, comprises. a pair of members movable independently of each other onto the work on the buck 1, each' having means, as a spring tending to move it toward the buck and the head, and each having latch means for impositively or frictionally latching the work holder member and the head together as thehead closes so that the work holder member moves with the head when the press opens.

9 and 10 designate respect ively the work holder members which are here shown as are shaped and formed to conform to the marginal end surface of the buck 1". Each of these work holder members 9, 10 is carried by an arm 11 or 12 which is carried by a bracket 13 mounted on the spindle 6, that is, mounted concentric with the lever 5.

The arms 11, 12 thus swing of the yoke lever 5. 12 is connected at 14 or 15 about the axis Each of the arms 11,

to its bracket 13 and has an arm 16 or '17 extending rearwardlybeyond the point 14 M15.

The arm 16 or 17 is pivoted to a block 18 i or 19 slidable on a rod 20 or 21 which is pivoted at 22 to the. frame or the standard 7. A compression spring 23 or 24'encircles' the rod 20 or 21 and thrustslagainst a shoulder 25 which carries the pivot point 18 or 19.

The arm 16 and rod 20 form a toggleslike linkage. form a toggle-like linkage, work holder members are ope Also, the arm 17 and the rod 21 and when the.

n, the links are on each wor in a straight line and hence, the sprin is ineffective. When the work holder mem ers are closed sufiiciently to break the straight line relation between the links, the spring 23 or 24 will react to move the work holder member 9 or 10 against the, buck. The parts are in the osition occupied by the arm 16, rod 20 as illustrated in Figure 1 when the work holder member is against the buck and are in the position shown b the arm 17, and the rod 21, when the work older member is up against the open head.

The latch means for holding the work holder members against the head is here shown as a air of spring arms or jaws 26 holder member and a pin 27 on the opposite end of the head for entering between the arms. When the work holder member is on the buck and the head is moved to closed position, the grip of the spring arms 26 on the pin 27 is sutficient to I frictionally interlock the head and the work holder member so that the work holder member is picked up by the head and follows the head'when the'head is opening and hence, lifts the work holder member oil the work as the head opens against the action of the spring 23 or 24 tending to hold it against the work on-the buck.

Each work holder member is provided with a suitable handle in the form of a knob 28, 29 by means of which the work holder member is pulled away or unlatehed from the head to fold the toggle links '16, 20 or 17, 21 and let the springs 23, 24 react to bring the work holder down on the Work on the buck.

The motor means for actuating the head is here shown as a fluid operated motor, as a cylinder 30, a piston 31 movable in the cylinder and having its rod 32 connected to a motion transmitting part 33 which is connected in any well known manner by toggle links to the rear arm of the yoke lever 7.

34 designates one of the toggle links. The piston is a single acting one and operates to close the press and the press .is opened, when the 'fiuid pressure on the piston is released, by springs 35 connected to the rear arm of the yoke lever. There are also, usually, additional springs 36 connected to the motion transmitting member 33. This motion transmitting member is a lever pivoted to the frame. The motion transmitting mechanism forms no part of this invention, and any well known form of motion transmitting mechanism may be used.

The flow of motive fluid, [as compressed air, to thecylinder is controlled by manual means, as a pair of manuals, carried by the work holder members 9, 10 and associated with the handles or knobs 28 and 29. These manual means are here shown as push buttons 37, 38 projecting above the knobs or handles 28, 29 and operating suitable valves which control the flow of air to the cylinder 30 from a feed line. These valves form no part of the invention, and are a rearrangement of the valves shown in the Davis Patent N 0. 1,609,273 dated November 30, 1926.

39 designates the feed pipe for a motive fluid, as an, which is coupled to a conduit 40 extending lengthwise of the arm 11 to a valve casing 41 located in the knob or handle 28. A normally closed intake valve 42 and a normally open exhaust valve 43 are located in the casing and the casing is connected to a pipe 44, a portion of which extends lengthwise of the arm 11, and this'pipe 44 is connected by a pipe or hose 45 to a master valve mechanism to be presently described.

The intake valve 42 and exhaust valve 43 are connected together by a stem 46 whereby they act as a unit and the exhaust valve 43 is connected by a stem'47 to the push button 37. Springs 48 and 49 act respectively on the intake valve 42 and the push button 37 to return them to their normal positions or the position occupied when the intake and a normally open exhaust valve 54 there in which are connected by a stem 55 whereby they act as a unit, these valves being here shown as in their normal ositions. The intake valve 53 is closed an the exhaust valve 54 is opened by a spring 56.

The master valve is operated and held in its operated position by pressure operated means as a pair of spaced apart diaphragms 57, 58 in a diaphragm chamber 59 at one end of the master valve casing 52. One of these diaphragms as 58 thrusts against the stem 60 of the exhaust valve 54. One side of the diaphragm chamber 59 is connected by a pipe 61 to the pipe 45.

The space between the diaphragms 57 'and 58 is connected by a pipe 62 to a source of compressed air which is controlled by the closing of the press or the position of the piston when the press is closed.

As here shown, the pipe 62 is connected to a pipe 63 connected to a casing 64 which opens through a port 65 into the cylinder between the ends thereof, in position to be uncovered-by the piston when the piston approaches the end of its power stroke.

In the operation of the mechanism thus ing both diaphragms 57 and 58 to the right (Figure 2) closing the exhaust valve 54 and opening the intake valve 53 permitting air to enter from the feed pipe 39, pipe 50, valve casing 52 and pipe 66 to the upper end of the cylinder to actuate the piston therein.

When the piston uncovers the port 65, the

air pressure from the cylinder above the piston passes through the pipes 63 and 62 to the space between the diaphragms thus holdin .the diaphragm 58 in its position occupied 10 when the intake valve 53 is open and the exhaust valve 54 closed, and thus holding the press closed.

The push button 38 operates a normally open exhaust valve 67 in a valve casing 68 within the handle 29. This casing is connected by a conduit or passage 69 formed in the work holdin member 10 and the arm 12 thereofto a con uit or hose 70 which is a continuation of the conduit or hose 45. The

push button 38 is held in its normalposition by a spring- 71 and also an exhaust valve 67 l is'held in its open position by a spring 72.

Thus, if the push button 37 is depressed without depressing the push button 38, the

air from thepipe 39 will have a free outlet from. the pipes 39 and 45 through the exhaust passage 73 controlledby the exhaust valve 67 and the master valve will not be operated and the piston will not be actuated unless the push button 38 is held depressed, while the push button 37 is being held depressed. Both buttons must be held depressed until the piston 31 uncovers the port 65.

When the pressure has been held as longas desired, the press may be opened by. re-

' leasing the pressure inthe cylinder 30. This is effected by a normally closed exhaust valve 74 located in the valve casing 75 and operated by a manual or lever 76 against the ac tion of a returning spring 77. The casing 74 is connected by a pipe 78 to the pipe 63. There are usually two of these release valves located at convenient points, but only one is necessary. The other release valve is designated 79. Each of these Valves is located in a "suitable housing 80 mounted on the frame of the machine. The knobs 28 and 29 are hollow and have outlets 28 -and 29" for air that exhausts from the. valve casings therein.

' Obviously, upon operation of the release lever 76, the air will be free to exhaust out through the pipe 63, pipe 78 past the open exhaust valve 74 in the casing .7 5 and out through the exhaust passage 81, and as soonas the air starts to exhaust out through the passage 81, the pressure is released in the diaphragm chamber 59, and particularly from the space-between thediaphragms so that the master exhaust valve 54 returns to its openv position and the master intake valve 53 moves to its closed position, and the air is free to exhaust from theupper end of the cylinder through the pipe 66. master valve casing 52, out through the exhaust passage as the handle 28, and moves the Work holder down on the work and then rearranges the work on the other end of the buck and pulls the other workholder member 12 down on the work. He then depresses both push buttons'37, 38 effecting the closing of the press. As the .press closes, the pins 27 of the latch mechanism movebetwee'n and are gripped by e the spring arms 26 on the work holders.

When the press isopened by-operating the I release lever 76, each work holder moves upwardly with the head and the links 16, 20

and 17, 21 move into-a dead center or straight line..

lVhat I claim is: j v

1. A pressing machine comprising a buck, a head movable toward and from the buck, means for actuating the head, work holding means movable into engagement with the work on the buck andmeans for controlling the operation of the actuating means including a manual carried by the work holding means.-

2. A pressing machine comprising a buck,

a head movable toward and from the buck, means for actuating the'head, work holding means movable into engagement with the work on the buck and means for controlling the operation of the actuating means includ- "ing a pair of manuals carried by the work holding means and connections between the manuals whereby both must beoperated si-' multaneously to effect the operation of the actuating means.

3. A pressing machine comprising a buck, a head movable toward and from the buck,

motor means for actuating the head, a pair of workholder members movable independ-- ently of each-other onto the work on the buck and means for controlling the operation ofthe motor means including manuals carrie d respectively by t-he .work holding members and connections' between the manuals whereby both manuals must be operated to efi'ectthe actuation of the motor means.

4. In a pressing machine, a buck, a head movable toward and from the buck, a work holder movable toward the buck independently of the head, metor means for'actuating the head, the work" holder, having a handle .by which it is'moved toward the buck, and

means for controlling the actuation of the motor means including a manual carried by said handle.

5. In a pressing machine, a buck, a head movable toward and from the buck, a work nolder movable toward the buck independently of the head, motor means for actuating the head, the work holding means having a pair of handles by which the same is moved toward the buck, means for controlling the actuation of the motormeans including manuals carried respectively by said handles and connections between the manuals whereby both must be operated simultaneously to effect the actuation of the motor means.

6. In a pressing machine, a suitable frame, a buck, a'head movable toward and from the buck, 'means for actuating the head, a work engaging member movable toward and from the buck, a supporting part for said member pivoted to the frame, a linkage comprising links pivoted together and connected respectively to said supporting part and to the frame and a spring acting on the linkage to move it and said member in one direction.

7. In a pressing machine, a suitable frame, a buck, a head movable toward and from the buck, means for actuating the head, a work engaging member movable toward and. from the buck, a supporting part for said member pivoted to the frame, a linkage comprising links pivoted together and connected respectively to said supporting part and to the frame and arranged to move into straight line position when said member is separated from the buck, and means for holding the linkage in a desired position.

8. In a pressing machine, a suitable frame, a buck, a head movable toward and from-the buck, means for actuating the head, a work engagingmember movable toward and from the buck, a supporting part for said member pivoted to the frame, a linkage comprising inks pivoted together and connected respectively to said supporting part and to the frame and arranged to move into straightened position whensaid member is separated from the buck, and a spring acting on the linkage to fold the same and move said member toward the buck.

9. In a pressing machine, a suitable frame,

a buck, a head movable toward and from the buck, means for actuating the head, a-

work engaging member movable toward and from the buck, a supporting part for said member pivoted to the frame, a linkage comprising links pivoted together and connected respectively to said supporting part and to the frame and arranged to move into straightened position when said member-is separated from thejbuck, and a spring act ing on the linkage to fold the same and move said member toward the buck," the head and said member having latching means for interengaging when the head is 

